3600 - 2638 962 Jared. First of the line of Seth who broke through the command of Enos, which prohibited intermarriage with the Cainites Genesis 6:1-2

3500 Intermarriage of the godly descendants of Seth and the ungodly descendants of Cain began. Genesis 6:1-2
Immorality, violence and godlessness increased.
Adam, Seth, Enoch, Cainan, Mahalaleel and Jarad continued communicating with their descendants.